B) Primary is where there is nothing no rock or soil
Sensitive, can turn itchy or irritated/red depending your type of skin.
Answer:
The answer is double helix.
Explanation:
In its natural state, each DNA molecule is actually composed of two single strands held together along their length with hydrogen bonds between the bases. Watson and Crick proposed that the DNA is made up of two strands that are twisted around each other to form a right-handed helix, called a double helix.
Hope this helps!! ;)
The two main types are DNA and RNA
